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TDA4454 - Multistandard VIF Amplifier and PLL Demodulator

Datasheet Summary

Description

This multistandard video IF processing circuit with PLL picture carrier regeneration gives a high performance of linear video demodulation.

The IF signal is internally fed via a 3-stage controlled wideband amplifier to the video demodulator and the phase detector.

Features

  • D Suitable for standard B/G, L and D2MAC, processes negative and positive modulated IF-signals with equal polarity of the output signal D D2MAC: fast AGC acting on peak level with controlled capacitor discharge D High performance video demodulator with PLL picture carrier regeneration D Output for delayed tuner-AGC, take over point adjustable D Extended video bandwidth (12 MHz) for the demodulation of amplitude modulated MAC-signals D High input sensitivity D Ultra white and ultra black lim.

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Datasheet Details

Part number TDA4454
Manufacturer TEMIC Semiconductors
File Size 150.51 KB
Description Multistandard VIF Amplifier and PLL Demodulator
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Full PDF Text Transcription

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TELEFUNKEN Semiconductors TDA4454 Multistandard VIF Amplifier and PLL Demodulator Application Monolithic integrated circuit for vision IF signal processing in multistandard TV and VTR sets. Description This multistandard video IF processing circuit with PLL picture carrier regeneration gives a high performance of linear video demodulation. The IF signal is internally fed via a 3-stage controlled wideband amplifier to the video demodulator and the phase detector. The phase detector compares the phase of IF signal (0°) with the output signal of the VCO (90°) and sets the VCO frequency accordingly. A lock detector switches the PLL loop filter according to the state of the PLL (locked-PLL slow, unlocked-PLL fast).
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